Exercise levels across the nation rose between 2001 and 2009, according to the study, which was based primarily on phone surveys.

Women’s activity level made the greatest leap, rising to 51.3% saying they exercise weekly, compared to 46.7% in 2001. Overall, men are more active, with 58% reporting they exercise weekly, but the number marked only a 1% increase from 2001.

Counties in Kentucky, Georgia, and Florida all reported big gains in physical activity. The highest increase for men was in Concho County, Texas, up from 41.4% to 58.2%, and women in Morgan County, Kentucky, increased from 25.7% to 44%.

A more active population will likely help reduce instances of cardiovascular disease and diabetes, the authors note. But the rise in physical activity didn’t lower the nation's weight [2]problem; obesity in almost all counties rose during the same time period.

“More aggressive strategies to prevent and control obesity are needed. Diet and changes in individual behavior are key components,” said Dr. Ali Mokdad, professor of Global Health at IHME and a study coauthor. “Understanding local trends in obesity and physical activity in both rural and urban areas will help communities develop successful strategies and learn from one another.”